Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Crutches
Patent
1992-06-25
1994-03-22
Friedman, Carl D.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Crutches
248688, 248 96, 135 72, A61H 302
Patent
active
052954994
ABSTRACT:
The handles of a pair of crutches have male and female coupling elements which enable them to be removably and rotatably fixed to one another. Crutches fixed in this manner can then be placed in a stable manner against any support at an elevation above their center of gravity.
REFERENCES:
patent: 1231030 (1917-06-01), Kelley
patent: 1870924 (1932-08-01), Platzer
patent: 2672311 (1954-03-01), Schiele
patent: 3606898 (1971-09-01), Harocopo
patent: 4506854 (1985-03-01), Kim
patent: 4834235 (1989-05-01), Solheim et al.
patent: 4921192 (1990-05-01), Jones
Friedman Carl D.
Mai Lan
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